<?php

declare(strict_types=1);

/**
 * SPDX-FileCopyrightText: Sebastian Krupinski <krupinski01@gmail.com>
 * SPDX-License-Identifier: AGPL-3.0-or-later
 */

namespace KTXM\ProviderImap\Smtp\Protocol;

use KTXM\ProviderImap\Smtp\Transport\ConnectionInterface;
use Psr\Log\LoggerInterface;

final class ProtocolWriter
{
    public function __construct(
        private readonly ConnectionInterface $connection,
        private readonly ?LoggerInterface $logger = null,
    ) {}

    /**
     * Write a single command line, appending the CRLF terminator.
     *
     * @param bool $sensitive when true the payload is redacted from logs
     *                        (used for AUTH credential exchanges)
     */
    public function writeLine(string $line, bool $sensitive = false): void
    {
        $this->logger?->debug('SMTP command sent: {command}', [
            'command' => $sensitive ? $this->redact($line) : $line,
        ]);

        $this->connection->write($line . "\r\n");
    }

    /**
     * Write raw bytes verbatim (e.g. the DATA payload). Never logged.
     */
    public function writeRaw(string $payload): void
    {
        $this->connection->write($payload);
    }

    private function redact(string $line): string
    {
        if (preg_match('/^(AUTH\s+\S+)(\s+.*)?$/i', $line, $matches) === 1) {
            return $matches[1] . (isset($matches[2]) ? ' [REDACTED]' : '');
        }

        return '[REDACTED]';
    }
}